Machine for applying cement



Oct. 31, 1933. R- w CUMMlNGs I 3,932,542

MACHINE FOR APPLYING CEMENT Filed Dec. 5l, 1931 WM5/WUR "i 'UNITED `STATES Patented Oct. 31, 1933 PATENT offrir. y

MAonINEroR APrLvINc. cEMrN'r .Roy W. Cummings, Beverly, Mass., assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Y Application December 31, 1931v Serial No. 584,175

3 Claims.

This invention relates to coating machines and is herein exempliiied with particular reference to applying cement to leather pieces such as the parts of boots and shoes.

5 The invention Will be discussed in connection with the problem of applying cement, for example pyroxylin cement, to the soles of shoes, as for example for the permanent attachmentv of the soles to the shoes. It will be understood, however,

that this is only one concrete illustration and that" the illustrated machine is applicable for other kinds of Work.

It should be noted that leather has certain peculiar characteristics, one of the most important of 15 which is that the opposite surfaces of the leather are entirely diieren't, the grain surface being much more compact and uniform in texture than the iiesh surface. a homogeneous substance but is fibrous and full of minute pockets or interstices. In the preparation of leather for its ultimatek use the flesh surface of the leather receives repeated treatments both before and after tanning in which portions of the hide are removed as by skiving. As a result of such treatments the surface of the leather is apt to be full oi dust particles and may contain small metallic particles. In the preparation of soles for incorporation in shoes in Which the soles are permanently attached by cement, the margins .39 are sometimes roughened, by the use, for example,

'Y of a Wire brush.l This creates more loose material. Furthermore, the tendency of such treatments is to mat or lay down the libres of the leather.

An object of my invention is to provide an improved cementing machine by means of which a more perfect application of cement Will be secured.

In accordance With an important feature of the invention the illustrated machine is provided with a suction nozzle which is positioned adjacent to and for coaction with the same surface of the Work as a cement-applying device and in advance of said applying device, with respect to the direction of the progress of the Work. As illustrated also, the cement-applying device comprises a driven applying roll in advance of Which is a Workpresenting table extending to a position closely adjacent to the roll and having a suction nozzle beneath the table the opening to which is a slit in the table. If desired the casing of the suction nozzle itself may be extended to form the Work table.

These and other characteristics and features of the invention are described in the following specification taken in connection with the accom- Furthermore, leather is not panyingdrawing in which the single figure illus# trates partially in elevation .and partially in section a cement-applying device and a suction mechanism.

A cement-applying roll 10 of substantially 4cy- 60 lindrical form is mounted upon a driven shaft 12 to rotate in the direction indicated by the arrow and dips in a cement receptacle 14. Coacting With this cement-applying roll is a presser roll 16 mounted upon a shaft 18 and preferably also 65 driven in the directionindicated bythe arrow, the arrangement being such that a piece of Work 2() is guided by an edge gage 22 and is held against the cement-applying roll 10 by pressure applied through the presser roll 16. The illustrated 7 0 presser roll 16 is slightly frusto conical Yas would be the case if the piece of Work 20 is a shoe sole in which the margin has been skived to bevel the edge, as indicated at 24. The cementing machine organization. just described may, if desired, be of the character illustrated in Letters Patent of the United States No. 1,732,591, granted October 22, 1929, upon the application of John W. Cosgrove. This patent is cited merely for the sake of illustration and any suitable and usual arrangement of a cementing machine which would embody the parts already described may be utilized. It will be understood that the open end of the cement receptacle is closed in use to retain the cement 27 by means of an end plate (not shown) which may be attached by means of screws threaded into the holes 26. At the rear side of the cementing roll the Work is supported and the receptacle is covered by means of a beveled plate 28 held in position by a screw. On 90 the advance side ofthe roll there is provided a Work table 30 having a slit 32 which constitutes the opening of a suction nozzle 34. As illustrated the work table is in fact one side of the casing of the suction nozzle. The end of the other side of the casing provides an intermediate supporting surface 86 which' is closely adjacent to the applying roll 10 and upon which the Work 20 rests in its progress from the nozzle to the applying roll. 100

In ord-er to produce/a partial vacuum or suction in the nozzle 34 any suitable apparatus may be employed such, for example, as a pump having a driven compressor 42 and the pump may be connected to the suction nozzle by means ,1,05 of a pipe 44. The length of the opening 32 of the suction nozzle in a direction transverse tothe direction of progress of the Work will be comparable to the width of the cement-applying roll 10.

In the operation of the machine a stripe of 11.10

cement is applied progressively to the under surface of the work 20 by means of the roll 10. This stripe may extend all the way to the edge of the work or may be separated :from the edge of the work, depending upon the adjustment of the gage 22. Just before the work comes into engagement with the cement-applying roll the portion of it to which the cement is to be applied will pass over the opening 32 of the suction nozzle and will be subjected to a partial vacuum which will not only remove loose particles of leather or metal dust but will also tend to cause the libres of the leather to stand upright from the surface of the leather, pointing downwardly as the machine is arranged, thus facilitating the forcing of cement into the interstces between the bres. If, as is commonly the fact, minute pockets are found in the surfaces of the leather then the action of the suction nozzle will be to exhaust the air from these pockets so that as the work pieces come to the applying roll this exhausted air may be replaced by cement and the latter drawn into more intimate contact with the leather. Inasmuch as the Work is held against the suction nozzle and the applying roll by the presser roll 16 the action of the suction is made more effective. Furthermore, the leather will be held in close contact'vvith the portion 36 of the nozzle 34 which lies between the opening 32 and the cement roll, thus helping to maintain the partial vacuum set up in the pockets and interstices of the leather.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a cement-applying machine, a driven applying roll, a cement receptacle beneath said roll in which said roll dips, a work presentingtable in advance of said roll extending to a position closely adjacent tothe upper portion of the same, a suction nozzle beneath the table, said table being provided with a slit constituting the opening to the suction nozzle, and means for creating aY partial vacuum in said nozzle.

2. In a cement-applying machine, a driven applying roll, a cement receptacle in which the lower part of said applying roll dips, a feed roll for holding a piece of work in contact with the upper side of the applying roll, a suction nozzle having a casing, one side of said casing being positioned closely adjacent to and in advance of the applying roll to support a piece of work presented to said rolls, and means for creating a partial vacuum in said nozzle to treat the surface of the work to which the cement is to be applied by said roll.

3. In a cement-applying machine, a cementapplying roll, a cement receptacle in which said roll dips, a suction nozzle secured to said cement receptacle and comprising a casing having an .upwardly opening slit, said casing at one side of said slit serving as a worli'r table to assist in presenting work and the. casing at the other side of the slit being positioned closely adjacent to and in advance of the applying roll and providing an intermedia surface between the suction opening andthe applying roll with which the side of the Work to be cemented contacts in passing from the suction nozzle to the applying roll, and means for holding the piece of Work in contactwith the Y 

